From: NeilBrown <neilb@suse.de>
Date: Mon, 26 Jun 2006 07:27:43 +0000 (-0700)
Subject: [PATCH] md/bitmap: fix online removal of file-backed bitmaps
X-Git-Tag: v2.6.18-rc1~637
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d7375ab324971e7acbea9f02a0269ae7348f4147;p=linux-2.6

[PATCH] md/bitmap: fix online removal of file-backed bitmaps

When "mdadm --grow /dev/mdX --bitmap=none" is used to remove a filebacked
bitmap, the bitmap was disconnected from the array, but the file wasn't closed
(until the array was stopped).

The file also wasn't closed if adding the bitmap file failed.

Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---

diff --git a/drivers/md/md.c b/drivers/md/md.c
index 8c1e190089..ea6837d45f 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -3601,10 +3601,13 @@ static int set_bitmap_file(mddev_t *mddev, int fd)
 		mddev->pers->quiesce(mddev, 1);
 		if (fd >= 0)
 			err = bitmap_create(mddev);
-		if (fd < 0 || err)
+		if (fd < 0 || err) {
 			bitmap_destroy(mddev);
+			fd = -1; /* make sure to put the file */
+		}
 		mddev->pers->quiesce(mddev, 0);
-	} else if (fd < 0) {
+	}
+	if (fd < 0) {
 		if (mddev->bitmap_file)
 			fput(mddev->bitmap_file);
 		mddev->bitmap_file = NULL;